/**
 * Copyright (c) 2017, Dirk-Jan Rutten
 * All rights reserved.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */
import { GraphQLScalarType, Kind } from 'graphql';
import type { GraphQLScalarTypeConfig } from 'graphql';
import { createGraphQLError } from '../../error.js';
import { parseTime, serializeTime, serializeTimeString } from './formatter.js';
// eslint-disable-line
import { validateJSDate, validateTime } from './validator.js';

/**
 * An RFC 3339 compliant time scalar.
 *
 * Input:
 *    This scalar takes an RFC 3339 time string as input and
 *    parses it to a javascript Date (with a year-month-day relative
 *    to the current day).
 *
 * Output:
 *    This scalar serializes javascript Dates and
 *    RFC 3339 time strings to RFC 3339 UTC time strings.
 */
const config: GraphQLScalarTypeConfig<Date, string> = {
  name: 'Time',
  description:
    'A time string at UTC, such as 10:15:30Z, compliant with ' +
    'the `full-time` format outlined in section 5.6 of the RFC 3339' +
    'profile of the ISO 8601 standard for representation of dates and ' +
    'times using the Gregorian calendar.',
  serialize(value: any): string {
    if (value instanceof Date) {
      if (validateJSDate(value)) {
        return serializeTime(value);
      }
      throw createGraphQLError('Time cannot represent an invalid Date instance');
    } else if (typeof value === 'string') {
      if (validateTime(value)) {
        return serializeTimeString(value);
      }
      throw createGraphQLError(`Time cannot represent an invalid time-string ${value}.`);
    } else {
      throw createGraphQLError(
        'Time cannot be serialized from a non string, ' +
          'or non Date type ' +
          JSON.stringify(value),
      );
    }
  },
  parseValue(value: any): Date {
    if (!(typeof value === 'string')) {
      throw createGraphQLError(`Time cannot represent non string type ${JSON.stringify(value)}`);
    }

    if (validateTime(value)) {
      return parseTime(value);
    }
    throw createGraphQLError(`Time cannot represent an invalid time-string ${value}.`);
  },
  parseLiteral(ast): Date {
    if (ast.kind !== Kind.STRING) {
      throw createGraphQLError(
        `Time cannot represent non string type ${'value' in ast && ast.value}`,
        { nodes: ast },
      );
    }
    const value = ast.value;
    if (validateTime(value)) {
      return parseTime(value);
    }
    throw createGraphQLError(`Time cannot represent an invalid time-string ${String(value)}.`, {
      nodes: ast,
    });
  },
  extensions: {
    codegenScalarType: 'Date | string',
    jsonSchema: {
      type: 'string',
      format: 'time',
    },
  },
};

export const GraphQLTime = /*#__PURE__*/ new GraphQLScalarType(config);
